Clock



FIG. 1 is a plan view of the clock;

FIG. 2 is a front elevational view of the clock;

FIG. 3 is a side elevational view taken from the right side of the clock;

FIG. 4 is a front perspective view taken from above the clock;

FIG. 5 is a rear perspective view taken from above the clock; and,

FIG. 6 is a cross-sectional view of the clock taken along line 6--6 of FIG. 2. 

The ornamental design for a clock, as shown and described. 